/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification of Java bytecode.
 *
 * Copyright (c) 2002-2018 GuardSquare NV
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard.classfile.editor;

import proguard.classfile.*;
import proguard.classfile.visitor.ClassVisitor;

import java.util.*;

/**
 * This ClassVisitor sorts the class members of the classes that it visits. The sorting order is based on the access
 * flags, the names, and the descriptors.
 *
 * @author Eric Lafortune
 */
public class ClassMemberSorter implements ClassVisitor, Comparator {
    // Implementations for ClassVisitor.

    public void visitProgramClass(ProgramClass programClass) {
        // Sort the fields.
        Arrays.sort(programClass.fields, 0, programClass.u2fieldsCount, this);

        // Sort the methods.
        Arrays.sort(programClass.methods, 0, programClass.u2methodsCount, this);
    }

    public void visitLibraryClass(LibraryClass libraryClass) {}

    // Implementations for Comparator.

    public int compare(Object object1, Object object2) {
        ProgramMember member1 = (ProgramMember)object1;
        ProgramMember member2 = (ProgramMember)object2;

        return member1.u2accessFlags < member2.u2accessFlags ? -1 : member1.u2accessFlags > member2.u2accessFlags ? 1
            : member1.u2nameIndex < member2.u2nameIndex ? -1
                : member1.u2nameIndex > member2.u2nameIndex ? 1 : member1.u2descriptorIndex < member2.u2descriptorIndex
                    ? -1 : member1.u2descriptorIndex > member2.u2descriptorIndex ? 1 : 0;
    }
}
